IRIS Pol. Torinohttps://iris.polito.itIl sistema di repository digitale IRIS acquisisce, archivia, indicizza, conserva e rende accessibili prodotti digitali della ricerca.Sun, 15 Sep 2019 07:31:19 GMT2019-09-15T07:31:19Z10321Time Domain Simulation of Group Delay Impairments in Telecommunication Systemshttp://hdl.handle.net/11583/1401893Titolo: Time Domain Simulation of Group Delay Impairments in Telecommunication Systems
Wed, 01 Jan 1986 00:00:00 GMThttp://hdl.handle.net/11583/14018931986-01-01T00:00:00ZDeflection Network: Principles, Implementation, Serviceshttp://hdl.handle.net/11583/2424521Titolo: Deflection Network: Principles, Implementation, Services
Sun, 01 Jan 1995 00:00:00 GMThttp://hdl.handle.net/11583/24245211995-01-01T00:00:00ZDevelopment of Android data logging and telemetry application for low power consumption vehicleshttp://hdl.handle.net/11583/2518932Titolo: Development of Android data logging and telemetry application for low power consumption vehicles
Sun, 01 Jan 2012 00:00:00 GMThttp://hdl.handle.net/11583/25189322012-01-01T00:00:00ZVirtual induction loops using smartphones for urban traffic control systemshttp://hdl.handle.net/11583/2676282Titolo: Virtual induction loops using smartphones for urban traffic control systems
Abstract: Growing traffic in ever congested urban cities can be managed by traffic control systems which monitor and forecast the traffic status and optimises the control strategy according to traffic flow. Such systems use input from inductive loop detectors which are costly to install and maintain. In this paper, we introduce and evaluate a novice software based solution called Virtual Induction Loops using a smartphone application and a central server. We also identify how current urban traffic control systems can benefit from such a dynamic solution.
Sun, 01 Jan 2017 00:00:00 GMThttp://hdl.handle.net/11583/26762822017-01-01T00:00:00ZAnalysis and Simulation of a Parallel Packet Switch for Satellite On-board Switchinghttp://hdl.handle.net/11583/1652950Titolo: Analysis and Simulation of a Parallel Packet Switch for Satellite On-board Switching
Abstract: In this paper we consider a packet switching system composed of X parallel switching planes
operating independently and at a speed lower than the input lines. Arriving traffic is segmented into
fixed length cells, then each cell is sent to one of the X planes, where it is switched to the correct
output port and finally recombined with the other cells, coming from other planes, to reconstruct the
original packet. This architecture, originally proposed by Iyer and McKeown [1], is referred to as a
Parallel Packet Switch (PPS) and allows to design a switching fabric operating at a fraction of the line
rate R. A PPS, with planes operating at rate r, must have at least k=R/r planes to avoid systematic
packet losses. In [1] it was proved that a PPS can emulate the behavior of an Output Queue Switch
(OQS) with the same buffering capabilities and the same number of ports. However, the centralized
scheduling algorithm required to achieve this result can not be easily implemented in hardware, due to
its complexity.
In this paper we propose a Redundant Parallel Packet Switch (RePPS), i.e. a PPS with more than k
planes, with a distributed scheduling algorithm, and multiplexing/demultiplexing stages without
coordination buffers, which is a fair trade-off between performance and complexity. In particular we
show that the minimum number n = X - k of redundant planes required to emulate an OQS with FIFO
policy under any incoming traffic type is n = k2-2k+1. The distributed scheduling algorithm, which is the
key component of the proposed switch, is presented and its performance, analyzed thru simulation, is
discussed for a realistic fabric with a limited number of redundant planes. The results so far obtained
suggest a possible application of this architecture for satellite on-board packet switches.
Mon, 01 Jan 2007 00:00:00 GMThttp://hdl.handle.net/11583/16529502007-01-01T00:00:00ZOn the performance of web services and Google cloud messaginghttp://hdl.handle.net/11583/2679314Titolo: On the performance of web services and Google cloud messaging
Abstract: Smartphones and other connected devices rely on data services, such as web services (WS) and Google Cloud Messaging (GCM), to share the information they collect or use. Traditionally, these services were classified according to their efficiency or their delivery time, but, when dealing with battery operated devices, another important parameter is the power consumption. In this paper, we present the results from a test on GCM and two types of WS, namely SOAP-based and RESTful WS. In these tests, we experimentally collected time, efficiency, and power consumption figures for all services. The final outcome is that RESTful WS outperforms all other communication techniques in terms of one-way delay, round trip time, data consumption, packet overhead and battery duration.
Sun, 01 Jan 2017 00:00:00 GMThttp://hdl.handle.net/11583/26793142017-01-01T00:00:00ZAll-Optical Bidirectional Manhattan Networkshttp://hdl.handle.net/11583/1658028Titolo: All-Optical Bidirectional Manhattan Networks
Wed, 01 Jan 1992 00:00:00 GMThttp://hdl.handle.net/11583/16580281992-01-01T00:00:00ZParallel CRC Generationhttp://hdl.handle.net/11583/1659501Titolo: Parallel CRC Generation
Mon, 01 Jan 1990 00:00:00 GMThttp://hdl.handle.net/11583/16595011990-01-01T00:00:00ZReal-Time Tools for Situational Awareness and Emergency Management in Transport Infrastructureshttp://hdl.handle.net/11583/2584393Titolo: Real-Time Tools for Situational Awareness and Emergency Management in Transport Infrastructures
Abstract: Critical transport infrastructures such as interchanges, long tunnels and bridges represent the most vulnerable environments within a transportation network; they are characterized by limited access/egress points and high volumes of users in close confines. A number of factors must be addressed to ensure maximum safety of both travellers and emergency service personnel; these include emergency preparedness, timely support for the decision-making process, and planning of optimal interventions in emergency management situations. This paper discusses the integration of wireless sensor networks (WSNs) and virtual reality (VR) to support the self-evacuation of travellers and operational procedures of rescue personnel within these environments, focusing on two key aspects of emergency operations: (i) collecting real-time data and (ii) improving the timeliness of first responders through efficient provision of the collected data. Testimonials, technical results and recommendations collated from two pilot installations realised within the EU-funded SAVE ME project demonstrate the qualitative and quantitative impact of such an approach on emergency situation management.
Wed, 01 Jan 2014 00:00:00 GMThttp://hdl.handle.net/11583/25843932014-01-01T00:00:00ZEsercizi svolti di comunicazioni elettrichehttp://hdl.handle.net/11583/1677561Titolo: Esercizi svolti di comunicazioni elettriche
Wed, 01 Jan 1997 00:00:00 GMThttp://hdl.handle.net/11583/16775611997-01-01T00:00:00Z